Fuse.



A. F. DAUM.

FUSE.

APPLICATION FILED Nov. za, 1910.

.Un'rrnn eterne y infinit,

Pnrnrii? 'ofFICE; f

, FUSE Loodsen 3.0.;- l i v No; "9615716," 'rgrsnted June lli? i Be deshaving the szineohjeets in view as y recited ininyprir patent, thepresent fin- 'Ventin has tonite object to provide e fusethat is moredurable, "sensitivej and more readily adjusted for'dierent voltage.'

VVAnotifierolojeet of the invention is to pro-` videe 'cartridge fuse inwhich the fuse'will' zoQbefnormslly retained .under tension, Wherefhyfeu`We@leaning"of:ythe fuse due to en eh-v norrnei voltage ivli immediatelycause thel New eert.' i; I l* Affiurth'e'r4 .object 'of thefinvention is'toi zsprovidehsiinple and edective Ineens "for reftnining the tu se ofai cart-ridge under tension and indicating when the fuse has beeny`burned out. t 4l; n

` l A still further object of the invention is tohprovide .e cartridgefuse with two eom vpertinents which will' ohvinte the necessity l "of.using e non-combustible and insulation materiel Within the" cartridgefuse. v` "I attain 'the shove objects hy ameehs-n'icel constructionthntnill be he'reinzitter specifi- "callydescribed `n1id"thenclaimed,and retf ereneeivill now be hed to the'dreiving forining s 'part of thisspe'cieetiom wherein there trated -i r i invention'fg" the stigueti hl'etol' such 'chain of the appended el 'in H In the drawing' t-igl e' l4 1tion of the fuse, Fign 2 is n ongitudinal seeH tional View of the saine,Fig. 3 is e cross sectional view of the fuse teken on the line III-Hl.'of Fig. 2, Fig. 4 i'sa similar View taken on the line V-IV of Fig. 2,Fig. 5 is a side elevation of e resilient Washer adapted to forni partof the fuse, Fig. 6 is s front elevation of the seine, Fig. 7 is en endView of e detached cap, and Fig. 8 is :i plsu df a portion of the Juse3A fuse in accordance With'this invention comprises s cylindrical shellor section of Appiicationieovemher 2 vil and l2 in thefsh'el lThe fuseextends-'ihr of the partition or iveh- 9.`

-posnL u y bent 'eut-weidly` and reiclmllyv disposed; es hest'slrmv'n'in ,FigiI-i toengnge: the 'outer tubing `l runde of 'a suitablenon-conductive material, and having the ends thereof screw threaded,'afs et A2 Lto" receive caps 3 'and 4f, seid caps having the'wellsthereof threaded to seres;7 upon the'ends of the shell i. ,ihe

oep 4- is providedivith ,shields 'wherehy the cartridge fuse een he,used in connection with e knife' siiiteh orhlzideeonteet; LozstedWithin the shell l "is noncoinhustihle and insulation materiel" 7,", essoapstone, chalk,`asbestos; etegpnd extending through the Y materiel''Tere e? plurality of strands o'i' wire 8 Wound' together` to constitutee Jfuse. The fuse extends through ev longitudinal opening G providedtl'eretor inveu partition or weh 9 arranged'intermediate the ends-of theshell l, seid 'pnrtitionfor Wehdividing the shell intoA tire"compartments l The peu slining With diaine elly `opposed openings oughen opening 13 provided therefor in e :fiat bnr lierrenged inthe openingslO-end ll,.the `open.ing 13 registering with ft elon'gitudingil opening@One Well-ofthe opening' 13 is .norintilly held yin* engagement with thefuse/,Shy ewnt compression spring fend thereofbem'ing upon the i youterend ottheha'r` Mend the opposite end having' one' thereof secured, :iset` i6 to the'sh l. .The

compression springl isprovided with en opening i7, and extendingthroughssid opening is n screw 11Sl detaehehly mounted in the shell il,said-'screw having the outer end thereofy provided With-ashead'l) toengage the compression spring 15 and limit the outward movement 'otsziidspring.` I Arranged sgmnstfthe ends ofthe shell 1 within? tjhe`r`rcups-*3' 'ind .t t ere (lished slit-ted washers QOheVing/centrulopenings 21 to' reieiVeT efends of the fuse 8,: theivire coin-4snidffi'use having the-ends `thereof sides of the washers 20. Theresiliency of the washers 20 is adapted to hold the ends of the strandsof Wire composing' the fuse, whereby the fuse will he retained in a tautposition within the non-combustible and insulation materiel 7 l The bnr14 and the compression spring 15 constitute means whereby the burningout of the fuse een he readily detected Without removing the oepsthereof, and when seid fuse does burn out, the tension of the HetlSpeciestionof Letters Estant. v l Pajggd `(Mgt- 1Q, 191i,

ei 1910.2 serial-Nc. seems.

compression sprin '15 forces bar 14 inwardly, thereby indicating thatthe fuse has been severed.

Since the fuse will be held under tension Aby the spring pressed bar 14,a weakening same can be fixed therein by bending the.

ends ot the Wires into'engagement with the Washers and replacingthe'caps 3 and 4.

lVhat I rilairn is f 1. In av cartridge fuse, the combination with ashell of non-'conductive material, and

insulation/filling the shell, a partition ar' ranged intermediate theends of said shell and dividing said shell into two compartments,saidpartition having a lateral opening alining with openings in saidshell, said partition vhaving a longitudinal opening `termed therein, abar movably mounted in the openings of said partition and said shell andprojecting beyond the latter, said bar having an opening formed thereinadapted to aline with the openings of said partition, a fuse extendingthrough the openingsv of said partition and said bar, means for holdingtheends of said fuse, caps detaehaloly mounted upon the ends of saidshell, and means carried by and exteriorly of said shell, and engagingthe projecting portion of the bar for normally holding the latter inengagement with said fuse.

2. ln a cartridge fuse, the combination with a shell of non-conductivematerial, of a partition arranged intermediate the ends ot said shelland having a lateral opening alining with the openings in said shell,said partition having a longitudinal opening formed therein, a flat liarmovably mounted in the openings ot said partition and said shell andprojefrting beyond the latter, said liar havingan opening formed thereinadapted to aline with the longitudinal opening of said partition, a fuseextending through the openings of said partition and said bar, i'ueanstor holding the ends of said fuse, caps detaehably ends of said shell.,means carried by and arranged exteriorly of said shell and engaging theprojecting portion of the bar to normally h old said bar in engagementwith said fuse, and means adjustable in said shell and adapted toregulate the last mentioned means.

8. A cartridge fuse including a shell of non-conductive material, apartition arranged intermediate the ends of said shell and infr,

said shell having its wall Yprovided with a pair of openings registerinwith the ends of the opening in the partition, said partition 'furtherprovided with a centrallydisposed longitudinally extending openingcommunicating with said lateral opening, a

rhar movahly-mounted in the openingsof said partition and shell andprojecting from the latter, said bar having an opening formedthereinadapted to aline witlf' the said longitudinal opening, a fuse extendingthrough said longitudinal opening and the opening of the bar, and meanscarried by the exterior of the shell and engaging the project-ingportion of the bar for normally holding the latter in engagement withthe fuse.

4. .A cartridge fuse including a shell of non-conductive material, apartition arranged intermediate the ends of said 'shell and formed witha laterally-disposed opening, said shell having its wall provided with apair of openings registering with the ends of the openingrin thepartition, said partition further provided with a centrallydisposedlongitudinally extending opening communicating #Vith said lateralopening, a bar movably-munted in the openings of said partition andshell and projecting from the latter, said bar having an opening formedthereinadapted to aline with the said longitudinal opening, a fuseexftending through said longitudinal opening and the opening of the bar,and resilient means earried by the shell exteriorly thereof and engagingthe proj .cting portion of the bar for holding the latter in engagementwith the fuse, and means for adjusting the tension of said resilientmeans. t

ln testimony whereof lvailix my signature in the presence of twowitnesses.

ALBERT F. DAUM.

lVitnesses: i

MAX l-l. SRoLovirz, E. A, Starten.

formed with a laterally-disposed open-- mounted upon the i

